From: David Sterba Date: Fri, 20 Feb 2015 17:43:47 +0000 (+0100) Subject: btrfs: replace remaining do_div calls with div_u64 variants X-Git-Tag: v4.1-rc1~5^2~59^2~1 X-Git-Url: http://git.cascardo.info/?a=commitdiff_plain;h=35b850f16d9adbb833775105ec942fbc818ee6a0;p=cascardo%2Flinux.git btrfs: replace remaining do_div calls with div_u64 variants Switch to div_u64_rem that does type checking and has more obvious semantics than do_div. Signed-off-by: David Sterba --- diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 4ccc3397c644..5840afe5e5f9 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -8670,7 +8670,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) min_free <<= 1; } else if (index == BTRFS_RAID_RAID0) { dev_min = fs_devices->rw_devices; - do_div(min_free, dev_min); + min_free = div64_u64(min_free, dev_min); } /* We need to do this so that we can look at pending chunks */ diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index f371aac91a90..740beed2aec5 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -1673,7 +1673,7 @@ find_free_space(struct btrfs_free_space_ctl *ctl, u64 *offset, u64 *bytes, */ if (*bytes >= align) { tmp = entry->offset - ctl->start + align - 1; - do_div(tmp, align); + tmp = div64_u64(tmp, align); tmp = tmp * align + ctl->start; align_off = tmp - entry->offset; } else { diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 07be15d4ce7b..4cdf739c7a47 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -2329,7 +2329,7 @@ static inline void __scrub_mark_bitmap(struct scrub_parity *sparity, } start -= sparity->logic_start; - offset = (int)do_div(start, sparity->stripe_len); + start = div_u64_rem(start, sparity->stripe_len, &offset); offset /= sectorsize; nsectors = (int)len / sectorsize; @@ -2628,7 +2628,7 @@ static int get_raid56_logic_offset(u64 physical, int num, stripe_nr = div_u64(stripe_nr, nr_data_stripes(map)); /* Work out the disk rotation on this stripe-set */ - rot = do_div(stripe_nr, map->num_stripes); + stripe_nr = div_u64_rem(stripe_nr, map->num_stripes, &rot); /* calculate which stripe this data locates */ rot += i; stripe_index = rot % map->num_stripes; diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 36c9c1a89232..e79eee9c127e 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4995,7 +4995,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, * stripe_nr counts the total number of stripes we have to stride * to get to this block */ - do_div(stripe_nr, stripe_len); + stripe_nr = div64_u64(stripe_nr, stripe_len); stripe_offset = stripe_nr * stripe_len; BUG_ON(offset < stripe_offset); @@ -5011,7 +5011,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, /* allow a write of a full stripe, but make sure we don't * allow straddling of stripes */ - do_div(raid56_full_stripe_start, full_stripe_len); + raid56_full_stripe_start = div64_u64(raid56_full_stripe_start, + full_stripe_len); raid56_full_stripe_start *= full_stripe_len; } @@ -5144,7 +5145,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, if (rw & REQ_DISCARD) num_stripes = min_t(u64, map->num_stripes, stripe_nr_end - stripe_nr_orig); - stripe_index = do_div(stripe_nr, map->num_stripes); + stripe_nr = div_u64_rem(stripe_nr, map->num_stripes, + &stripe_index); if (!(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS))) mirror_num = 1; } else if (map->type & BTRFS_BLOCK_GROUP_RAID1) { @@ -5172,7 +5174,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, } else if (map->type & BTRFS_BLOCK_GROUP_RAID10) { int factor = map->num_stripes / map->sub_stripes; - stripe_index = do_div(stripe_nr, factor); + stripe_nr = div_u64_rem(stripe_nr, factor, &stripe_index); stripe_index *= map->sub_stripes; if (rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) @@ -5209,32 +5211,32 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, stripe_index = 0; stripe_offset = 0; } else { - u64 tmp; - /* * Mirror #0 or #1 means the original data block. * Mirror #2 is RAID5 parity block. * Mirror #3 is RAID6 Q block. */ - stripe_index = do_div(stripe_nr, nr_data_stripes(map)); + stripe_nr = div_u64_rem(stripe_nr, + nr_data_stripes(map), &stripe_index); if (mirror_num > 1) stripe_index = nr_data_stripes(map) + mirror_num - 2; /* We distribute the parity blocks across stripes */ - tmp = stripe_nr + stripe_index; - stripe_index = do_div(tmp, map->num_stripes); + div_u64_rem(stripe_nr + stripe_index, map->num_stripes, + &stripe_index); if (!(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) && mirror_num <= 1) mirror_num = 1; } } else { /* - * after this do_div call, stripe_nr is the number of stripes - * on this device we have to walk to find the data, and - * stripe_index is the number of our device in the stripe array + * after this, stripe_nr is the number of stripes on this + * device we have to walk to find the data, and stripe_index is + * the number of our device in the stripe array */ - stripe_index = do_div(stripe_nr, map->num_stripes); + stripe_nr = div_u64_rem(stripe_nr, map->num_stripes, + &stripe_index); mirror_num = stripe_index + 1; } BUG_ON(stripe_index >= map->num_stripes); @@ -5269,8 +5271,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, sizeof(int) * tgtdev_indexes); /* Work out the disk rotation on this stripe-set */ - tmp = stripe_nr; - rot = do_div(tmp, num_stripes); + div_u64_rem(stripe_nr, num_stripes, &rot); /* Fill in the logical address of each stripe */ tmp = stripe_nr * nr_data_stripes(map);